package ycl.gateway.config;

import lombok.AllArgsConstructor;
import org.springframework.cloud.gateway.config.GatewayProperties;
import org.springframework.cloud.gateway.route.RouteLocator;
import org.springframework.cloud.gateway.support.NameUtils;
import org.springframework.context.annotation.Primary;
import org.springframework.stereotype.Component;
import springfox.documentation.swagger.web.SwaggerResource;
import springfox.documentation.swagger.web.SwaggerResourcesProvider;

import java.util.ArrayList;
import java.util.List;

/**
 * swagger配置
 *
 * @author ycl
 * @date 2022/6/21 0021 18:09:00
 */
@Component
@Primary
@AllArgsConstructor
public class SwaggerProvider implements SwaggerResourcesProvider {
	public static final String API_URI = "v2/api-docs";
	private final RouteLocator routeLocator;
	private final GatewayProperties gatewayProperties;


	@Override
	public List<SwaggerResource> get() {
		List<SwaggerResource> resources = new ArrayList<>();
		List<String> routes = new ArrayList<>();
		routeLocator.getRoutes().subscribe(route -> routes.add(route.getId()));
		gatewayProperties
				.getRoutes()
				.stream()
				.filter(routeDefinition -> routes.contains(routeDefinition.getId()))
				.forEach(routeDefinition -> routeDefinition
						.getPredicates()
						.stream()
						.filter(predicateDefinition -> ("Path").equalsIgnoreCase(predicateDefinition.getName()))
						.forEach(predicateDefinition -> resources.add(
										swaggerResource(routeDefinition.getId(),
												predicateDefinition
														.getArgs()
														.get(NameUtils.GENERATED_NAME_PREFIX + "0")
														.replace("**", API_URI)
										)
								)
						)
				);
		return resources;
	}

	private SwaggerResource swaggerResource(String name, String location) {
		SwaggerResource swaggerResource = new SwaggerResource();
		swaggerResource.setName(name);
		swaggerResource.setLocation(location);
		swaggerResource.setSwaggerVersion("2.0");
		return swaggerResource;
	}
}

